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Showing posts tagged with hypervisor
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stuartbeattie | 26 Sep 2011

With Linux officially 20 years old, the globally deployed, pan-device operating system is a far cry from the hobby system launched by student Linus Torvalds. While Linux kernel engineers now number over a thousand however, its original developer still keeps a tight control over what goes in and what stays out. So, when the notoriously outspoken Finn speaks, people listen. But just how seriously should his recent remark, “Virtualization is evil,” be taken?

 

Linus Torvalds
Linus Torvalds - Photograph by...

Robert Mol | 10 Aug 2011

X86 Virtualization is a key enabler for business; virtualization allows you to get more computing done with less hardware. Realizing the full advantages of these technologies can however be very costly. The most beneficial and sought-after features are also often the most expensive. Every market experiences commoditization over time, and x86 is no exception. Once a costly technology unavailable to any excepting the largest enterprises, the bare essentials are today available as free type 1 hypervisors. Fast, simple, and compact, these free hypervisors can virtualize multiple operating systems on a single piece of hardware, but not much else.

If you are interested in virtualization for any reason other than condensing...

stuartbeattie | 26 Jul 2011

While virtual servers remove many constraints caused by tying operating systems and applications to hardware, they are still subject to the same risks and issues associated with their physical equivalents. A server is a server, with processing, memory and I/O, after all. But just because it shares the same facets as a tin-and-silicon machine, does this mean it should be secured in the same way? To answer this, it’s worth thinking about the architecture that results from server virtualization. You will still have physical servers (it’s a bit hard to do without them) each of which will be running several virtual servers. As such and from a security perspective, you’ve actually added a layer – which can be both a benefit and a constraint.

Advantages & Disadvantages

First, the advantages. In principle, a virtualized environment can benefit from all the security measures already in place in the physical world. If physical servers are in a...

paul dominjon | 21 Jul 2011

Welcome to IT Industry Trends, the new virtualization blog from Symantec. We’ve launched this blog to give us a place to talk about all aspects of virtualization, cloud computing and more, with information for those of all levels of knowledge and expertise. Before we get started, though, it never hurts to take a look back at how virtualization started, what it is and why people are realising that it’s now a key part of any enterprise IT strategy.

What is Virtualization?

Very basically, virtualization is the creation of one or more emulated computers on one single physical computer. It is referred to as emulated because it is not running directly off of the computer’s hardware, but on a virtual recreation of this hardware - in other words, software pretending to be hardware. This means that one computer can split up its real physical resources (RAM, processing power, etc.), and simulate multiple computers instead. Each of these has...